diff --git a/requirements.txt b/requirements.txt
index ab3844c..ca39f4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@
 coverage==4.5.2
 mypy==0.670
 prospector==1.1.6.2
-sphinx_rtd_theme==0.4.2
+sphinx_rtd_theme==0.4.3
 tox==3.7.0